Wrapper



Dec. 11, 1934. s. RosN 1,983,813

WRAPPER Filed June 27, 1934 2 Sheets-Sheet 1 Dec. 11, 1934.

S. ROSEN WRAPPER Filed June 27, 1934 I 2 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

Patented Dec. 11, 1934 UNITED STATES PATENT OFFICE.

2 Claims.

The present invention relates generally to improvements in the art of producing flexible wrappers for various cake-like commodities, such as bread, candy, and the like, and relates more spe- 6 cifically to improvements in the manufacture of wrappings and packages of the window type whereinportions of the packed articles are visible thru the confining envelope.

A general object of the present invention is the provision of an improved wrapper of the window type, which is simple and durable in construction, and which is, moreover, highly effective in use.

It has heretofore beenproposed to pack commodities such as candy bars in composite window wrappers, each comprising a main outer sheet of flexible, translucent material such as waxed paper having an opening therein disposable over the face of the bar which is to be enwrapped, and a transparent pellicle of flexible sheet material such as Cellophane secured to the interior of the main translucent sheet near the edges of the window opening. While this prior type of wrapper was relatively satisfactory in the production of a compact package and in the provision of a restricted sight opening or window, it was, in fact, objectionable for several specific reasons. First, the disposition of the pellicle within the main wrapper was objectionable be- 30 cause the edge portions of the window opening would tend to become engaged by finger nails or the like during handling of the packages, and the main wrappers would tear at said openings. Secondly, the window openings of the prior wrappers were of square or rectangular formation, and the main wrapping sheets would tear easily at the corners of these openings. And, thirdly, the sight openings or windws were confined to the face or upper portions of the enwrapped articles 40 and therefore did not provide for visibility of the sides of the objects.

In order to eliminate some of these objections while retaining the desirable features of these prior window wrappers, the revelation type of wrapper wasintroduced and is now in extensive commercial use. This so-called revelation wrapper comprises spaced, parallel, outer or side ribbons or strips of waxed paper or the like having an intervening strip of transparent sheet material such as Cellophane adhesively attached to the wax-free, adjacent edges of the outer strips. When this improved type of window wrapper is applied to a cake-like object such as a loaf of bread or a bar of candy, the window strip is wrapped centrally about the object so as to exnection between the spaced, outer ribbons, these being joined only by the intervening, transparent pellicle, the adhesive joints alone must be relied upon to resist transverse separation of the strips constituting the wrapper. The production of the unions between the several ribbons or strips by virtue of the elimination of wax at the surfaces of adhesion is, moreover, difilcult and costly; and this elimination of wax at the joints also destroys, to at least some extent, the moisture-resistant quality of the wrapper when used in hot and dry climates.

It is therefore a more specific object of the present invention to provide an improved window wrapper which possesses all of the desirable features of both of the above-described, previous types of such wrappers, without introducing any of the objectionable features.

Another specific object of the present invention is to provide an improved revelation type of wrapper which, while exposing to view the face as well as several sides or ends, and even the back of the confined object, will possess maximum strength and prevent undesirable tearing of the envelope.

A further specific object of the present invention is to provide an improved, composite, window type of wrapper having an improved, relatively moisture-proof joint between the several sections, and which may be conveniently applied to the article in one operation.

Still another specific object of the present invention is to provide a simple, composite wrapper of the revelation type, the window areas of which may be readily produced, which is effectively reenforced adjacent these areas, and which can be manufactured at minimum cost and with least waste of wrapping material.

These and other objects and advantages will be apparent from the following detailed description:

A clear conception of a number of embodiments of the present invention, and of the mode of manufacturing and of utilizing variousforms of window wrappers made in accordance with the improvement, may be had by referring to the drawings accompanying and forming a part of this specification, in which like reference characters designate the same or similar parts in the several views.

Fig. 1 is a partially disrupted plan view of a ribbon of composite, flexible wrapping material comprising a main perforated strip of translucent waxed paper, the elliptical sight openings of which are covered by a strip of flexible, transparent material, showing the latter adhesively attached to the main strip and a comer thereof bent back to show the detailed construction;

Fig. 2 is a perspective view of a package comprising a loaf of bread confined within one of the wrappers of Fig. 1;

Fig. 3 is a plan view of a modified form of composite wrapper with circular window open ings and having the transparent pellicle adhesively attached to the exterior of the main wrapping sheet; I

Fig. 4 is a similar view of another modification wherein the windows are of diamond shape while the transparent strip is likewise adhesively attached to the main sheet;

Fig. 5 is a partially disrupted, plan view of a further modified form of composite wrapping ribbon having the main strip provided with two rows of elliptical windows and the transparent strip mechanically attached, without adhesive, to the main strip, a portion of the window strip having been folded back to reveal details of construction;

Fig. 6 is a plan view of a modified form of composite wrapper having the several elements mechanically connected, without adhesive, and showing both elliptical and diamond-shaped window openings;

Fig. 7 is a similar view of a similar type of composite wrapper with a modified form of mechanical attachment for the window strip and with star-shaped window openings in the main sheet;

Fig. 8 is another plan view of a further modifled composite wrapper with a modified me-- chanical joint and diamond-shaped windows; and

Fig. 9 is an enlarged, fragmentary, transverse section thru the wrapper of Fig. 8, taken along the line 99.

While the invention has been shown and described herein as being applied to window wrappers such as are ordinarily utilized for packing loaves of bread, it is not intended to limit the scope by such specific disclosure; and the improvement is obviously applicable to wrappers for any cake-like articles such as candy bars and other confections or commodities.

Referring to Figs. 1 and 2 of the drawings, the improved composite window wrapperv shown therein comprises a main ribbon or strip of universally flexible sheet material 10, such as translucent, wax-coated paper, having a series or sue.- cession of elliptical window openings 11 extending across its medial portion; and a relatively thin and likewise universally flexible pellicle or strip of transparent sheet material 12, such as Cellophane, adhesively attached at its longitudinal edges to the outer areas 13 of the main strip material 10. The successive wrappers may be formed as a continuous ribbon which is subsequently severed into sections along the transverse lines 14, and each completed wrapper may contain any desired number of the window openings 11, The

the latter.

'fectively bound together.

areas 13 are preferably left unwaxed so as to make the adhesive more effective, and the joints may subsequently be coated with wax in order to make the same moisture resistant. The outer surfaces of the composite wrapper may be provided with decorative borders 15 around the openings 11 and elsewhere and may also be printed for identification of the contents of the package. When one of these wrappers is applied to a loaf of bread or the like, the package assumes an appearance as shown in Fig. 2, with the window openings 11 arranged about the medial portion of the loaf and exposing portions of the top, sides, and bottom thereof. The edge portions of the main strip material may be folded as shown to conceal and to protect the extreme ends of the loaf, and the transparent strip material 12 encircles the main wrapper and the object intermediate the concealed ends of the latter.

Referring to Fig, 3, the composite wrapper therein shown comprises a main sheet of material 16, such as translucent waxed paper, having a series of circular window openings 17 extending across the medial portion thereof; and a flexible window strip of transparent material 18, such as Cellophane, adhesively attached to the exterior of the main sheet and extending over all of the openings 17. This modified wrapper may likewise be provided with ornamentation 19 as shown and may be manufactured and utilized the same as the wrapper previously described.

Referring to Fig. 4, the composite, flexible wrapper shown in this figure likewise comprises a main sheet of translucent material 20, such as waxed paper, having a series of diamond-shaped window openings 21 arranged in a series across the medial portion of the sheet; and a flexible pellicle of transparent material 22, such as Cellophane, adhesively attached along its longitudinal edges to the external surface of the main sheet and spanning the openings 21. This wrapper may also be decorated with borders 23 or otherwise and may likewise be manufactured and used in the manner defined in connection with the wrapper of Figs. 1 and 2.

Referring to Fig. 5 of the drawings, the composite window wrapping reprewnted therein comprises a main ribbon or sheet of flexible material 24, such as waxed paper, having two series of elliptical window openings 25 extending therealong; and a relatively thin strip of transparent, flexible material 26, such as Cellophane, disposed over all of the openings 25 and mechanically attached at its edge and medial portions to the main sheet of material 24 by means of stripes of knurling 27. The successive wrappers of this modification may again be formed as a continuous ribbon which may subsequently be severed into individual wrapper lengths along lines 28, and the mechanical joints 27 may be produced by distorting the coacting sheets of material 24, 26 between knurled rollers, while subjected to heat. These joints are preferably heated suiiiciently to melt the wax coating during distortion and should be subsequently rapidly cooled; and an additional'coating of wax may also be applied to the exterior of the material 26 at the joint in order to increase the moisture-proof characteristics of This improved form of mechanical joint forms the subject of my copending application Serial No. 728,940, filed June 4, 1934; and by applying such knurling 2'7 beween the rows of perforations or openings 25, the adjacent medial portions of the sheet materials 24, 26 are ei- This improved composite wrapper with mechanical Joints may be. utilized precisely as shown in Fig. 2 and likewise provides a series of windows extending entirely around the wrapped object.

Referring to Fig. 6, the composite, flexible wrapper shown therein comprises a main sheet of translucent, flexible material 29 such as waxcoated paper, having a series of alternate, elliptical and diamond-shaped window openings 30 viously utilizable in the manner previously de-" scribed.

Referring to Fig. 7, the composite wrapp shown therein again comprises a main strip or sheet of flexible material 33, such as translucent, waxed paper, having several series of star-shaped openings 34 extending therealong; and a strip of relatively thin, transparent material 35 span- "ning these openings and attached thereto by means of longitudinally crimped joints 36. These joints 36 may again be formed as previously described, and theintermediate joint serves to hold thesh'eets of material 33, 35 against undesirable spreading; and this modified type of wrapper may likewise be utilized in the manner previously described.

Referring to Fig. 8, the modified wrapper illustrated therein comprises a main sheet of flexible material 27, such as wax-coated paper, having several staggered series of diamond-shaped window openings 38 extending thereacross; and a transparent pellicle of material 39 disposed over the openings 38 and attached to the sheet material 3'7 by means of rows of diagonal crimping 40. The crimping 40 may likewise be formed in the manner previously referred to with the aid of heating and cooling rollers, and this modifled type of wrapper may also be used in the manner heretofore described.

In Fig. 9 is shown an enlarged, transverse section thru the crimping 40 constituting the joint between the sheets of material 37, 39 of the wrapper illustrated in Fig. 8, but a section thru the mechanical joints 27, 32, 36 of the preceding Figs. 5, 6, and '1 respectively, will appear substantially the same. The crimping of these joints is sufiicient to provide an interlock between the projections on one sheet and the recesses of the other, and the heating and subsequent cooling of these joints causes the wax coating of the main sheet 37 to effectively seal the joint and to provide an additional union. A

coating of wax may also be appliedto the outer surfaces of the transparent material 39 at these joints, in order to makethe same substantially moisture proof, and these joints may be applied to the sheets wherever desired, without specially preparing the surfaces of the wax-coated sheet. as was necessary with the prior glued joints.

While no borders or other decorations have been shown applied tothe outer surfaces .of the wrappers of Figs. 5-8 inclusive, it late be understood that these may be applied wherever desired, asinFigs. l, 3, and4. I

From the foregoing specific description of a number of modified forms of wrappers embodying the present invention, it will be apparent that an important feature of the improvement is the provision of a fiexible wrapper having a number of local window openings exposing the top, sides,

and back of the enwrapped object. The attach-' ment of the transparent pellicle to the exterior of the main wrapper protects the edges of these local openings and prevents tearing of the main wrapper. The integral connection between the side portions of the main wrapper beyond the window openings enables the wrapper to effectively resist transverse separation and also protects the joints between the waxed paper and the transparent window sheet. By forming. the window openings elliptical or round, as illustrated in Figs. 1, 3, 5, and 6, there is less tendency toward tearing of the main wrapper at the window openings, such as exists withthe use of rectangular or other openings having sharp corners. The mechanical union aflorded by the crimped joints shown in Figs. 5-9 inclusive, may be applied without previously preparing the adjoining surfaces of the main wrapper such as is necessary with glued joints, and these mechanical joints may be applied to the main wrapper closely adjacent to the window openings and may even be extended entirely around the latter. When the transparent pellicle is of considerable width, it would ordinarily be desirable to utilize mechanical joints of this type intermediate the edges of the pellicle. The improved wrappers may obviously be produced at minimum cost and, with least waste of material, and since the improved wrapper comprises only two parts, which are .ultimately interconnected, this wrapper may be handled without-exercising the great care which is now necessary in handling three-piece, composite wrappings. The improved wrappers may obviously be manufactured in a manner quite similar to that now employed in the manufacture of the revelation wrappers but with simpler machinery inasmuch as only two rolls of material need be handled in its formation. The window openings may be readily produced with the aid of rollers having dies associated therewith, and the crimped joints may likewise be conveniently formed with suitable cooperating sets of rollers.

It should .be understood that it is not desired to limit the invention to the exact details of construction and to theprecise mode of using the wrappers herein shown and described, for various modifications within the scope of the claims may occur to persons skilled in the art.

It is claimed and desired to secure by Letters Patent: 7

l. A commodity wrapper, comprising, a single main sheet of translucent fiexible wrapping material having a uniform series of window openings extending from one end thereof to the other, and 1 a single strip of flexible transparent material of less width and'of the same length as the main sheet disposed over all of said openings, said strip being permanently attached directly to the exterior of said main sheet on opposite sides of said openings and entirely across the sheet.

2. A commodity wrapper, comprising a single main sheet of translucent fiexible wrapping material having a uniform series of window openings extending from one end thereof to the other, and a single strip of flexible transparent material of less width and of the same length as the main sheet, in registry with all of said openings, said strip being permanently attached at its opposite side edges directly to said main sheet.

BHY 

